Having adjusted the Relative Airflow and Absolute Airflow convergence tolerances, as well as the Maximum Number of Iterations under AirflowNetwork:SimulationControl, which solved an earlier fatal error (Error: Too many iterations in Airflow Network simulation), I have encountered the fatal error below and have run out of ideas for resolving it. A google search turned up a similar problem with E+ v7 over on the Design Builder Forum but without a solution.
The Airflow Network I am attempting to simulate includes several large window openings which I understand can cause errors due to the high airflow transfer between zones. Reducing the aperture sizes is an obvious solution, however, high airflow/transfer rates is a desired quality of this test simulation so I would prefer to retain the large window openings.
(Using e+ v8.3.0 x64) Thank you in advance
From the *.err file:
* Severe * Convergence error in SolveForWindowTemperatures for window ZONE_1_WINDOW_005MM * ~~~ * During Warmup, Environment=RUN PERIOD 1, at Simulation time=09/29 08:30 - 08:32 * ~~~ * Glazing face index = 1 ; new temperature =NANC ; previous temperature = 9.4479C *
~~~ * Glazing face index = 2 ; new temperature =NANC ; previous temperature = 13.9687C * Fatal * Program halted because of convergence error in SolveForWindowTemperatures for window ZONE_1_WINDOW_005MM ...Summary of Errors that led to program termination: ..... Reference severe error count=1 ..... Last severe error=Convergence error in SolveForWindowTemperatures for window ZONE 1 WINDOW 005MM
